Paper feeding



May 1o, 1927. 1,628,224

H. BRADsHAw PAPER FEEDING Filed Jan. 28. `1921 Patented May 410, 1927.I

UNITED STATES l y -1,6zs',2z4 PATENT o`i-"i=ici5..l

:naarv aminsnaw, or meas ciiri'm'ssoum.

ram miams.

' Application led January 28, 102k Serialv No. 440,600.A

without having some of the sheets stick to gether. l

The object of my invention is to so treat the outer sheet'of the pile sothat a partial separation of the sheet from the pile will be effectedpreliminary to the operation of detaching the sheet from thev pile. f Myimproved method effects thispartial separation of the sheets from the-pile by 1 heating the -outer side of the outer sheet,`

therebyv expanding the air which is'between -the outer sheet andthesheet next adjacent thereto, which Aoperation permits be the sheet to bereadily detached pfrom the pile.

My invention prvidesu'rther the .a

outer sheet for the purpose of taking hold 39 of the sheet after it hasbeen heated.

The novel `4features 'of my invention arel hereinafter fully describedand claimed.

' In vthe accompanying drawing, which illustrates apparatus 1forcarrying my invention into effect, n

Fig.l 's a view partly in elevation and -partly in vertical section vofan apparatus' embodying one formof my' invention. Fig.,2'isl a'diagrammatic viewshowing 4*) the relative positions of the threelcams;

Fig. 3 isan enlar d vertical'section ofthe nozzle shown in ig. 1.LFig."4 is a vertical sectional view of an 'other apparatus 4forcarryinginto-elfect an,

.45 otherform of my invention.

Similar reference charactersA designate similar parts in the differentviews. Referring Ii'i'st to Figs. 1, 2 and 3, 1 designates a pile ofpaper fromwhich the 5 sheets are 4to be fe j Reciprocatively mounted inasuitable support '2 .is a vertically slidable member 3 having a tubularlower end to' which is.

l fitted-and which dischar s into a nozzle 4, 5 having mounted in'Iitsower side a per- Vheating thisfsheet and the air 'sheet sand. `theone next adjacentv thereto.

forate plate 5, preferably concavo-conv'ex the under side being concave.

' Pivotedto' the upper-end of member "i3 is a rod 6, connected to 'aneccentric strap 7 which embraces. .in the usual manner an eccentric v8,which isjrig1dly; "secured`A` to a horizontal shaft 9 rotatably mountedin support 2 and having secured to it a pulley 10` which may be rotatedby any suitable power.

11 and 12 designate respectively two pump cylinders in which are.respectively vertical-lyl reciprocative two pistons 13 and 14respectively pivoted at their upper ends to two connecting-rods 15 and16, which are respectivelyl attached to two eccentric straps 17 and 18mounted .respectivelyon two eccentrics 19and 20 which are ysecured toand disposed in similar positions on the shaft 9..

The cylinderl 11 is connected below the piston 13 to-a flexible Atube 21whichat its other end communicates with the-passage 22 provided-in thelower end of the memlower end V-of the Acylinder 12 and at its pl'fotherend it is disposed so as to prpject a cation of suction toxthe outerside o the jet of heated air against the upper or outer side of the topor outer sheet of thepile of paper 1. i

The air passing through thetube 23 may be heated in any suitable manner,as by a coil 24 of resistance wire which encircles forms part of asuitable electric circuit.

A tube 23 `is connected at one end with the .the tube 23 and which islocated in and o0 ln the operation of this form of my. in-

, vention when the piston 14A descends, heated air` will be dischargedagainst the top or outer sheet of the pile of. vpa er, thereby tweenthls The heating of the top sheet willeiect two functions. It will tendto curl the sheet 'upabling the top sheet being readily detached fromthe sheet next below. After/this partial .separation has been effectedby the heating of the to sheet, any suitable means may be employe "todetach the. top sheet Afrom the ile.

In the orm shown inv V1 ,iwhen the l piston 13 movesupwardl 1t willeiect a suction through thenozz 4 and p e...

22. As illustrated in Fig. 2 the cams 19 and 20 are set a little inadvance of the cam 8, vso that svhen the nozzle 4 is against or closelyadjacent to the top sheet of the pile 1, suction is being effected inthe nozzle 4 which will cause the top sheet to adhere to the nozzle, sothat the latter will lift the top sheet on the continued upwardImovement of the member 3, so that the top sheet may be readily seizedby any suitable device and drawn from the pile of paper.' Y It will benoted that when the member 3 carrying the .nozzle 4 is descending, 'thepiston 14 will lbe projecting heated air against the upper`side of thetop sheet, thereby heating the sheet so as to effect the partialseparation from the sheet next below it, so that the. top sheet will hein condition for engagement with thc nozzle 4 when the latter is inoperative position.

Preferably the Iopsheet is heated at one of its corner. portions, butthis is not essen- -tial in carryingmy invention into effect.

-In the form of' my invention shown in Figkt, the top sheet of the pile1 is heated by meansof an ordinary electric heater of any ordinary typehaving a downwardly facing i coil 26. This electriczheater is disposedabove theA pile in aposition such that it will quickly heatthe top sheetof the pile. Afterl being heated in `this manner. the top sheet maybe/detached by any suitable mechanism, such as a horizontal roller 27having perforations disposed radially therein and desifv#I '.jated by 28and arranged to conLecutivel-,yy

communicate with a r-adial opening 29 provided `in the under side of ahorizontal .tubular shaft 30 on which the rollers 27 is rotatablymounted.

'When the roller 27 is `rotated in the` di-v rection indicated by thearrow in Fig. 4 and bears against the top sheet .of the pile, and apartial vacuum is created in the tubular shaft 30, suction w'ill becreated which will cause the top sheet to adhere to the roller 27, whichwill cause the previously heated sheet to be slid from the pile. AAnysuitable 4means may be employed to drive the roller 27'and to create apartial vacuum in the With the use of my invention the top .sheet can bereliably separated from the one next below and liability of two sheetssticking together and being withdrawn at one time from the pile will beeliminated.

"I do not limit my invention to the structures shown and described, asmany modifications Within the scope of the appended claims may be madewithout departing from the spirit of my invention.

WhatIclaim is: fv `l. In feeding sheets of paperfrom -a pile,

deflector 25 and a central heating.

perforatedv neaaaea fluid against the outer side of a corner portion ofthe outer sheet preliminary to the removal of the sheet from the pile,substantially as set forth.

'4. In feeding sheets of paper from a pile. the method consisting-inprojecting heated air against the outer side of a corner portion of theouter sheet preliminary to the removal of the sheet from the pile,substantially asset forth. 5. In feeding sheets of paper from a pile,the method consisting in projecting heated air against the outer side ofthe outer sheet and then applying suction to the outer-'side ofthe'sheet in the operation of detaching the sheet from the pile,substantially as set forth.

6. In feeding sheets of paper from a pile, the method consisting inprojecting heated air against the outer-'side of the outer sheet andthen lifting` the sheet by suction'in the operation of detaching thesheet from the pile, substantially as set forth.` l

7. In lfeeding sheets of paper from a pile, the method consisting ,inprojecting heated air against the outer side of a corner por tion oftheouter Vsheet and then lifting by suction said portionv in the operationof detaching the sheet 'from the pile, substantially asset forth.

.8. In feeding sheets of paper from a pile, the method consisting inprojecting' heated air. against the outer side of the outer sheet, andthen withdrawing the 1 sheet from the pile, substantially as set forth.

9. Infeeding sheets of paper from apile,l

In testimony .whereof I have signed my nime to this specification.

' HARRY BRADSHAW.

